matlab把华氏度,MATLAB GUI实例1——摄氏度与华氏度的转换
MATLAB的GUI可以实现人机交互。在命令窗口中输入guide即可打开GUI工作界面。我们可以方便地建立控件以及编写程序,实现人机交互。
下以摄氏度与华氏度的转换为例进行说明。
最终效果如下图:
总共有5个控件:2个静态文本(static text),2个可编辑文本(edit
text),1个滑动条(slider)。
用户可以通过2个可编辑文本输入数值,也可以直接拖动滑动条实现取值。因此总共有3个回叫函数callback。
程序代码:
function varargout = temp_conver(varargin)
% TEMP_CONVER M-file for temp_conver.fig
% TEMP_CONVER, by itself, creates a new TEMP_CONVER or raises the existing
% singleton*.
%
% H = TEMP_CONVER returns the handle to a new TEMP_CONVER or the handle to
% the existing singleton*.
%
% TEMP_CONVER('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in TEMP_CONVER.M with the given input arguments.
%
% TEMP_CONVER('Property','Value',...) creates a new TEMP_CONVER or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before temp_conver_OpeningFunction gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to temp_conver_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Copyright 2002-2003 The MathWorks, Inc.
% Edit the above text to modify the response to help temp_conver
% Last Modified by GUIDE v2.5 04-Mar-2016 17:07:22
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @temp_conver_OpeningFcn, ...
'gui_OutputFcn', @temp_conver_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before temp_conver is made visible.
function temp_conver_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to temp_conver (see VARARGIN)
% Choose default command line output for temp_conver
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes temp_conver wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = temp_conver_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
function edit1_Callback(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit1 as text
% str2double(get(hObject,'String')) returns contents of edit1 as a double
deg_f=str2num(get(hObject,'string'));
deg_c=to_c(deg_f);
set(handles.edit1,'string',sprintf('%.1f',deg_f));
set(handles.edit2,'string',sprintf('%.1f',deg_c));
set(handles.slider1(2),'Value',deg_c);%下标2非常关键,是BUG,handles.slider输出有2个值,后面的值才是句柄
% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc
set(hObject,'BackgroundColor','white');
else
set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
function edit2_Callback(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit2 as text
% str2double(get(hObject,'String')) returns contents of edit2 as a double
deg_c=str2num(get(hObject,'string'));
deg_f=to_f(deg_c);
set(handles.edit1,'string',sprintf('%.1f',deg_f));
set(handles.edit2,'string',sprintf('%.1f',deg_c));
set(handles.slider1(2),'Value',deg_c);
% --- Executes during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc
set(hObject,'BackgroundColor','white');
else
set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
% --- Executes on slider movement.
function slider1_Callback(hObject, eventdata, handles)
% hObject handle to slider1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'Value') returns position of slider
% get(hObject,'Min') and get(hObject,'Max') to determine range of slider
deg_c=get(hObject,'value');
deg_f=to_f(deg_c);
set(handles.edit1,'string',sprintf('%.1f',deg_f));
set(handles.edit2,'string',sprintf('%.1f',deg_c));
set(handles.slider1(2),'Value',deg_c);
% --- Executes during object creation, after setting all properties.
function slider1_CreateFcn(hObject, eventdata, handles)
% hObject handle to slider1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: slider controls usually have a light gray background, change
% 'usewhitebg' to 0 to use default. See ISPC and COMPUTER.
usewhitebg = 1;
if usewhitebg
set(hObject,'BackgroundColor',[.9 .9 .9]);
else
set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
function deg_f=to_f(deg_c)
deg_f=(9/5)*deg_c+32;
function deg_c=to_c(deg_f)
deg_c=(5/9)*(deg_f-32);
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